公开(公告)号：US20240186041A1

公开(公告)日：2024-06-06

申请号：US18285178

申请日：2022-12-20

Applicant: POSCO Co., Ltd

Inventor： Ohyeoul Kwon ,  Woosin Kim ,  Kyuseok Han

IPC: H01F1/18 ,  C21D1/74 ,  C21D6/00 ,  C21D8/12 ,  C21D9/46 ,  C21D10/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/34 ,  C22C38/60

CPC classification number: H01F1/18 ,  C21D1/74 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1261 ,  C21D8/1272 ,  C21D8/1283 ,  C21D9/46 ,  C21D10/005 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/34 ,  C22C38/60 ,  C21D2201/05 ,  C22C2202/02

Abstract: According to an exemplary embodiment of the present invention, a grain oriented electrical sheet includes: a plurality of deformed parts formed on a surface of the electrical sheet along a rolling direction, in which an interval between the deformed parts is changed over an entire length of the sheet in response to an index Ks of sensitivity calculated by Equation 1 below, and at least two areas having a different interval between the deformed parts exist.


Ks=(0.7×Ds+0.3×B8)/10  [Equation 1]

(in Equation 1, Ks denotes an index of sensitivity, Ds denotes a particle size of grain (mm), and B8 denotes a magnetic flux density T measured at magnetic field strength of 800 A/m.)

公开(公告)号：US20240186039A1

公开(公告)日：2024-06-06

申请号：US18285481

申请日：2022-04-06

Applicant: NIPPON STEEL CORPORATION

Inventor： Kazutoshi TAKEDA ,  Takashi KATAOKA ,  Shinsuke TAKATANI ,  Yuuki KOGAKURA ,  Yuki KUNITA

IPC: H01F1/147 ,  C21D1/74 ,  C21D6/00 ,  C21D8/12 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C24/10 ,  C23C26/00 ,  C23C28/04

CPC classification number: H01F1/14783 ,  C21D1/74 ,  C21D6/005 ,  C21D6/008 ,  C21D8/1222 ,  C21D8/1255 ,  C21D8/1261 ,  C21D8/1272 ,  C21D8/1283 ,  C21D8/1288 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C24/10 ,  C23C26/00 ,  C23C28/04 ,  C21D2201/05 ,  C22C2202/02

Abstract: This grain-oriented electrical steel sheet includes: a base steel sheet; and an insulating coating formed on a surface of the base steel sheet, in which the insulating coating includes an intermediate layer formed on a base steel sheet side and containing a crystalline metal phosphate, and a tension coating layer formed on a surface side of the insulating coating, the surface of the base steel sheet has an etch pit structure, an average thickness of the intermediate layer is 0.2 to 10.0 μm, an average thickness of the insulating coating is 2.0 to 10.0 μm, the tension coating layer contains a metal phosphate and silica, and an amount of the silica in the tension coating layer is 20 to 60 mass %.

公开(公告)号：US20240186038A1

公开(公告)日：2024-06-06

申请号：US18491915

申请日：2023-10-23

Applicant: SEIKO EPSON CORPORATION

Inventor： Mayu WATANABE

IPC: H01F1/147 ,  B22F1/142 ,  B22F3/02 ,  B22F3/24 ,  B22F5/10 ,  B22F9/08 ,  C22C38/02 ,  C22C38/20 ,  C22C38/26 ,  C22C38/32 ,  C22C38/34

CPC classification number: H01F1/14775 ,  B22F1/142 ,  B22F3/02 ,  B22F3/24 ,  B22F5/106 ,  B22F9/082 ,  C22C38/02 ,  C22C38/20 ,  C22C38/26 ,  C22C38/32 ,  C22C38/34 ,  H01F27/255

Abstract: A soft magnetic powder contains a composition represented by a composition formula FexCuaNbb(Si1-y(B1-zCrz)y)100-x-a-b in terms of atomic ratio [in which a, b, x, y, and z satisfy 0.3≤a≤2.0, 2.0≤b≤4.0, 75.5≤x≤79.5, 0.55≤y≤0.91, and 0.015≤z≤0.185], and impurities. A crystallite diameter measured by X-ray diffractometry is 6.0 nm or more and 13.0 nm or less.

公开(公告)号：US20240183014A1

公开(公告)日：2024-06-06

申请号：US18074470

申请日：2022-12-03

Applicant: Arthur Craig Reardon

Inventor： Arthur Craig Reardon

IPC: C22C38/30 ,  B33Y70/00 ,  C22C33/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24

CPC classification number: C22C38/30 ,  B33Y70/00 ,  C22C33/02 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24

Abstract: A new high speed steel composition and article are disclosed consisting, in weight percent, essentially of about 0.75% to 1.69% carbon, 0.15% to 0.80% manganese, 0.20% maximum phosphorous, 0.25% maximum sulfur, 0.20% to 0.65% silicon, 3.75% to 4.50% chromium, greater than 10.00% to 20.00% tungsten, 1.75% to 4.21% molybdenum, 4.00% maximum vanadium, 4.00% maximum columbium, 12.00% maximum cobalt, 0.010% to 0.090% nitrogen, 0.75% maximum copper, 0.75% maximum nickel, 0.25% maximum aluminum and balance iron with residual elements and trace impurities in normal amounts, the composition and article being characterized by very high hardness capability and wear resistance. The high speed steel article is preferably manufactured via powder metallurgy by dispersion of a liquid metal stream of the alloy with nitrogen gas to form metal powder. This metal powder may be utilized in metal additive manufacturing applications and is suitable for applications involving chip cutting machining, or advanced machine elements.

公开(公告)号：US20240182994A1

公开(公告)日：2024-06-06

申请号：US18526078

申请日：2023-12-01

Applicant: SINTOKOGIO, LTD.

Inventor： Yuta Saito ,  Atsuki Kurokawa ,  Kan Aoki

IPC: C21D8/00 ,  C21D1/18 ,  C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46

CPC classification number: C21D8/005 ,  C21D1/18 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C21D2201/00 ,  C21D2211/001

Abstract: The manufacturing method of the reference piece for measuring retained austenite includes performing quenching and tempering a metal member after performing nano-crystallization on at least a portion of a surface of the metal member.

公开(公告)号：US20240181806A1

公开(公告)日：2024-06-06

申请号：US18553618

申请日：2022-04-12

Applicant: NIPPON STEEL CORPORATION

Inventor： Taketo MAEJIMA ,  Taro OSAKA ,  Yuichiro YAMAMOTO ,  Naoki MATSUI

IPC: B60B17/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50

CPC classification number: B60B17/0006 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  B60B2360/102

Abstract: In a cross section of the hub part of the railway wheel, obtained when the hub part is cut in a central axis direction of the through hole along a plane including a central axis, when regions of 15 mm×15 mm defined by a plurality of axial line segments parallel to the central axis and arranged at a pitch of 15 mm in a radial direction from an inner peripheral surface of the through hole, and by a plurality of radial line segments perpendicular to the central axis and arranged at a pitch of 15 mm in the central axis direction from a surface of the hub part in which an opening of the through hole is formed are defined as rectangular regions, the average C concentration in each rectangular region in the cross section of the hub part is less than 0.90% by mass.

公开(公告)号：US12000028B2

公开(公告)日：2024-06-04

申请号：US15751020

申请日：2016-08-17

Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION

Inventor： Taizo Makino ,  Takayuki Kamimura ,  Yuichiro Yamamoto ,  Yutaka Wakasu ,  Kiyonobu Sugae ,  Yukiteru Takeshita ,  Naomitsu Mizui

IPC: C22C38/50 ,  B61F5/50 ,  C21D1/28 ,  C21D6/00 ,  C21D8/06 ,  C21D9/08 ,  C21D9/28 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  F16C3/02

CPC classification number: C22C38/50 ,  B61F5/50 ,  C21D1/28 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/065 ,  C21D9/08 ,  C21D9/28 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  F16C3/02 ,  F16C2204/62 ,  F16C2326/10

Abstract: Provided is a rail vehicle axle having an excellent fatigue limit and notch factor. A rail vehicle axle according to the present embodiment has a chemical composition consisting of, in mass %, C: 0.20 to 0.35%, Si: 0.20 to 0.65%, Mn: 0.40 to 1.20%, P: 0.020% or less, S: 0.020% or less, Sn: 0.07 to 0.40%, N: 0.0200% or less, Cu: 0 to 0.30%, Ni: 0 to 0.30%, Cr: 0 to 0.30%, Mo: 0 to 0.08%, Al: 0 to 0.100%, V: 0 to 0.060%, and Ti: 0 to 0.020%, with the balance being Fe and impurities, and satisfying Formulae (1) and (2):

0.58≤C+Si/8+Mn/5+Cu/10+Cr/4+V≤0.67  (1)

Si+0.9Cr≥0.50  (2)



where, each element symbol in Formulae (1) and (2) is substituted by the content (mass %) of a corresponding element.

公开(公告)号：US12000008B2

公开(公告)日：2024-06-04

申请号：US17787174

申请日：2020-12-18

Applicant: POSCO

Inventor： Ki-Cheol Kang ,  Chung-Hwan Lee ,  Yong-Joo Kim ,  Kang-Min Lee ,  Kyoo-Young Lee

IPC: B32B15/01 ,  B32B15/04 ,  B32B15/18 ,  C21D1/19 ,  C21D1/25 ,  C21D1/76 ,  C21D1/84 ,  C21D3/04 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C21D9/56 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C23C28/00 ,  C23C28/02 ,  C23C30/00

CPC classification number: C21D9/46 ,  B32B15/01 ,  B32B15/013 ,  B32B15/04 ,  B32B15/043 ,  B32B15/18 ,  C21D1/19 ,  C21D1/25 ,  C21D1/76 ,  C21D1/84 ,  C21D3/04 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0257 ,  C21D8/0263 ,  C21D8/0273 ,  C21D8/0278 ,  C21D9/562 ,  C22C38/001 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  C23C2/02 ,  C23C2/022 ,  C23C2/0224 ,  C23C2/024 ,  C23C2/06 ,  C23C2/28 ,  C23C2/29 ,  C23C2/40 ,  C23C28/025 ,  C23C28/3225 ,  C23C28/345 ,  C23C30/00 ,  C23C30/005 ,  B32B2307/732 ,  Y10T428/12583 ,  Y10T428/1259 ,  Y10T428/12597 ,  Y10T428/12611 ,  Y10T428/12618 ,  Y10T428/1266 ,  Y10T428/12667 ,  Y10T428/12799 ,  Y10T428/12958 ,  Y10T428/12965 ,  Y10T428/12972 ,  Y10T428/12993 ,  Y10T428/24942 ,  Y10T428/2495 ,  Y10T428/24967 ,  Y10T428/24983 ,  Y10T428/26 ,  Y10T428/27 ,  Y10T428/273

Abstract: The present disclosure relates to a high-strength hot-dip galvanized steel sheet having excellent surface quality and electrical resistance spot weldability, and a method for manufacturing the same. A galvanized steel sheet according to an aspect of the present disclosure is a galvanized steel sheet including a base steel sheet and a zinc-based plating layer formed on a surface of the base steel sheet, wherein a ratio (a/b) of a hardness of a surface layer portion (a) to a hardness of an internal portion (b) of the base steel sheet may be less than 0.95.

公开(公告)号：US12000006B2

公开(公告)日：2024-06-04

申请号：US17248953

申请日：2021-02-15

Applicant: MACLEAN-FOGG COMPANY

Inventor： Charles D. Tuffile ,  Harald Lemke

IPC: C21D8/02 ,  B22F10/00 ,  B22F10/20 ,  B22F10/28 ,  B22F10/32 ,  B22F10/36 ,  B22F12/17 ,  B23K26/00 ,  B33Y10/00 ,  B33Y40/00 ,  B33Y70/00 ,  C21D1/18 ,  C21D1/613 ,  C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/20 ,  C22C38/22 ,  C22C38/26 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C23C8/22 ,  C23C8/54 ,  B22F1/05 ,  B22F3/24 ,  B22F9/08 ,  C22C33/02

CPC classification number: C21D1/18 ,  B22F10/00 ,  B22F10/20 ,  B22F10/28 ,  B22F10/32 ,  B22F10/36 ,  B22F12/17 ,  B23K26/0006 ,  B33Y10/00 ,  B33Y40/00 ,  B33Y70/00 ,  C21D1/613 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0257 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/20 ,  C22C38/22 ,  C22C38/26 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C23C8/22 ,  C23C8/54 ,  B22F1/05 ,  B22F2003/241 ,  B22F2003/248 ,  B22F9/082 ,  B22F2201/02 ,  B22F2201/30 ,  B22F2998/10 ,  B22F2999/00 ,  C22C33/0278 ,  Y02P10/25

Abstract: Alloy compositions for 3D metal printing procedures which provide metallic parts with high hardness, tensile strengths, yield strengths, and elongation. The alloys include Fe, Cr and Mo and at least three or more elements selected from C, Ni, Cu, Nb, Si and N. As built parts indicate a tensile strength of at least 1000 MPa, yield strength of at least 640 MPa, elongation of at least 3.0% and hardness (HV) of at least 375.

公开(公告)号：US11993852B2

公开(公告)日：2024-05-28

申请号：US17253866

申请日：2018-06-20

Applicant: POSCO

Inventor： Jong Hee Kim ,  Kwang-Min Kim ,  Bo-Sung Seo

IPC: C23C22/06 ,  C22C38/00 ,  C22C38/02 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C23C22/78 ,  C25F1/06 ,  H01M8/021 ,  H01M8/0228

CPC classification number: C23C22/06 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C23C22/78 ,  C25F1/06 ,  H01M8/021 ,  H01M8/0228

Abstract: Disclosed is a method of manufacturing a stainless steel with excellent contact resistance for a polymer fuel cell separator. The method of manufacturing a stainless steel with excellent contact resistance for a polymer fuel cell separator according to an embodiment of the present disclosure includes: electrolyzing to remove a first passivation film formed on a cold-rolled thin sheet of a stainless steel comprising, in percent (%) by weight of the entire composition, C: greater than 0 to 0.1%, N: greater than 0 to 0.02%, Si: greater than 0 to 0.25%, Mn: greater than 0 to 0.2%, P: greater than 0 to 0.04%, S: greater than 0 to 0.02%, Cr: 22 to 34%, Ti: greater than 0 to 0.5%, Nb: greater than 0 to 0.5%, the remainder of iron (Fe) and other inevitable impurities; and immersing in a mixed acid solution of nitric acid and hydrofluoric acid to form a second passivation film on the stainless cold-rolled thin sheet.